Visual Basic 6中的控件属性 [英] Control Properties in Visual Basic 6
本文介绍了Visual Basic 6中的控件属性的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
有没有办法在一个循环中请求控件属性?
Is there a way to ask for a control property in a loop??
我需要这样的东西:
For each p in control.properties
if p = "Value" then
msgbox "I Have Value Property"
elseif p = "Caption" then
msgbox "I Have Caption Property"
end if
next
$ b $,则
结尾b
这可以通过某种方式完成吗?
It could be done somehow?
推荐答案
在Experts Exchange上找到了此代码。添加对 TypeLib信息的引用。
Found this code on Experts Exchange. Add a reference to TypeLib Information.
Public Enum EPType
ReadableProperties = 2
WriteableProperties = 4
End Enum
Public Function EnumerateProperties(pObject As Object, pType As EPType) As Variant
Dim rArray() As String
Dim iVal As Long
Dim TypeLib As TLI.InterfaceInfo
Dim Prop As TLI.MemberInfo
On Error Resume Next
ReDim rArray(0) As String
Set TypeLib = TLI.InterfaceInfoFromObject(pObject)
For Each Prop In TypeLib.Members
If Prop.InvokeKind = pType Then
iVal = UBound(rArray)
rArray(iVal) = UCase$(Prop.Name)
ReDim Preserve rArray(iVal + 1) As String
End If
Next
ReDim Preserve rArray(UBound(rArray) - 1) As String
EnumerateProperties = rArray
End Function
您可以要求提供可读的列表,或者可写属性。
You can ask for a list of the readable, or writeable properties.
奖金,请问是否存在特定属性。
Bonus, ask if a specific property exists.
Public Function DoesPropertyExist(pObject As Object, ByVal _
PropertyName As String, pType As EPType) As Boolean
Dim Item As Variant
PropertyName = UCase$(PropertyName)
For Each Item In EnumerateProperties(pObject, pType)
If Item = PropertyName Then
DoesPropertyExist = True
Exit For
End If
Next
End Function
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